Future Buy/Would Like to Play
Uncharted 4: A Thief's End - PS4 (I would but again, see above)
Batman Arkham Knight - PC (need to play the last one first)
The Last Guardian - PS4
Trackmania - PC
Cuphead - XBO

I say I won't buy it, but it will miraculously appear in my Steam library eventually after a lacking self control in the summer sales.
Black Ops 3
Ghost Recon; Wildlands
Rainbow 6 siege
Rise of the Tomb Raider (if it ever leaves the Xbox one, even then, I'll probably end up buying an Xbone)
Too be honest, 90% of the multiplatform games shown at E3 will end up in my steam library some time in the future.